#include <iostream>
#include <cstdio>
#include <unistd.h>
#include <string>
#include <pthread.h>


pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cond = PTHREAD_COND_INITIALIZER;

void* active(void* arg)
{
    std::string name = static_cast<const char*>(arg);
    while(true)
    {
        pthread_mutex_lock(&mutex);
        pthread_cond_wait(&cond,&mutex);
        printf("%s isactive!\n",name.c_str());
        pthread_mutex_unlock(&mutex);
    }
}

int main()
{
    pthread_t tid1,tid2,tid3;
    pthread_create(&tid1,nullptr,active,(void*)"thread-1");
    pthread_create(&tid2,nullptr,active,(void*)"thread-2");
    pthread_create(&tid3,nullptr,active,(void*)"thread-3");

    sleep(1);
    printf("Main thread ctrl begin...\n");

    while(true)
    {
        printf("main wakup thread...\n");
        pthread_cond_signal(&cond);
        sleep(1);
    }


    pthread_join(tid1,nullptr);
    pthread_join(tid2,nullptr);
    pthread_join(tid3,nullptr);
    return 0;
}